Shoal

Source : Wright, Joseph English Dialect Dictionary web : https://eddonline4-proj.uibk.ac.at/edd/main.html

SHOAL, adj. and sb. Yks. e.An. [ʃōl.] 1. adj. In comb. Shoal furrow, a shallow furrow, the last ploughed before taking the balk up. e.An.1 2. sb. A flood of water in meadows beside a stream. w.Yks.2

un sillon peu profond, le dernier labouré avant de lever la jauge

Source : Admiral W H Smyth - The Sailor's Wordbook

SHOAL. A danger formed by sunken rocks, on which the sea does not break; but generally applied to every place where the water is shallow, whatever be the ground. (See FLAT SHOAL, SHOLE, or SCHOLL) Also, denotes a great quantity of fishes swimming in company----squamosee cohortes. Also, a vessel is said to shoalen, or shoal her water, when she comes from a greater into a less depth. SHOALED-HARBOUR. That which is secured from the violence of the sea, by bank; bars, or shoals to seaward.